The Milltek Sport Large Bore De-Cat Downpipe is designed to significantly improve exhaust gas flow, throttle response, and overall performance on LCI MINI F55/F56 Cooper S & JCW models fitted with GPF/OPF.
 
Manufactured with a larger diameter than the OEM downpipe, this system removes the restrictive catalytic converter, allowing exhaust gases to exit more efficiently. When paired with a Milltek Cat-Back system, the result is noticeable power gains and a more aggressive exhaust note.
 
⚠️ Requires a Stage 2 ECU remap.
 
Key Features
Large-bore performance downpipe
Catalyst delete for maximum exhaust flow
Improves power, torque & throttle response
Aggressive motorsport exhaust tone
Manufactured from high-quality stainless steel
Designed specifically for Milltek Cat-Back systems
UK made by Milltek Sport
 
Included Parts
MSM359REP – Large Bore De-Cat Downpipe (GPF Models)
F5134 – Sleeved Downpipe Adapter (70mm OD to 70mm ID, 105mm long)